Normalized Difference Vegetation Index
NDVI - Crop health
There’s an increasing number of drones that are being used in agriculture, as it proves to be very efficient in providing precise temperature measurements to quantify crop diseases, insects, salinity, and other external factors that can decrease yield. Ranchers also utilize thermal drones to keep track of their herds.
NDVI Vegetation Index
Vegetation Spectrum
The Normalized Difference Vegetation Index (NDVI) is an index of plant “greenness” or photosynthetic activity and is one of the most commonly used vegetation indices. Vegetation indices are based on the observation that different surfaces reflect different types of light differently.
Photosynthetically active vegetation, in particular, absorbs most of the red light which hits it while reflecting much of the near-infrared light. Vegetation that is dead or stressed reflects more red light and less near-infrared light. Likewise, non-vegetated surfaces have a much more even reflectance across the light spectrum.
By taking the ratio of red and near-infrared bands from a remotely sensed image, an index of vegetation “greenness” can be defined. The Normalized Difference Vegetation Index (NDVI) is probably the most common of these ratio indices for vegetation. NDVI is calculated on a per-pixel basis as the normalized difference between the red and near-infrared bands from an image.
NDVI Crop Management Benefits
- Canopy coverage & density detection
- NDVI with time provides accurate growth trending
- Frost damage detection
- Large scale pest outbreaks
- Optimizing crop rotation duration
- Ecological benefits
- Vegetation dynamics or plant phenological changes over time
- Biomass production.
- Grazing impacts or attributes related to grazing management (e.g., stocking rates)
- Changes in rangeland conditions
- Vegetation or land cover classification
- Soil moisture
- Carbon sequestration or CO2 flux
Sample Projects
Green Chili Field